Piston size

[Lawrence Edwards]

Does anyone know if the racing and thp 155 have the Same Pistons or does the racing have bigger Pistons?

[cyclone]

They are the same size. All 1.6l prince family engines whether Pug, Citroen, or Mini in all of their different power levels have 77mm bore with a 85.8mm stroke for a displacement of 1598cc.

[Lawrence Edwards]

Thank you very much

[Jamie@SPTuning]

Can anyone confirm the compression ratio of the Racing? I'm led to believe it's 11:1 where as the 150/155 are 10.5:1

[DS3RACING96]

Piston size

It's the same thp mate

[Jamie@SPTuning]

Are part numbers the same?

[Dangerousfish]

Can anyone confirm the compression ratio of the Racing? I'm led to believe it's 11:1 where as the 150/155 are 10.5:1

These sites suggest 11:1 for the DS3R:

http://www.carfolio.com/specificatio...ar/?car=247984
http://www.otodata.com/cars/Citroen/...ing/49724.html
https://en.wikipedia.org/wiki/Prince_engine

For the THP175 (EP6DTS, later EP6CDTS) maximum torque is 178 lb-ft (247 N·m) at 1600 rpm, remaining flat to 5000 rpm. Power output is 175 PS (173 hp/128 kW) at 5500 rpm. An overboost function is available which temporarily increases torque to 192 lb-ft (260 N·m) between 1700 rpm and 4500 rpm in gears 3 to 5.

Applications:

2006–2010 Peugeot 207 RC
2007–2010 Mini Cooper S
2008–present Peugeot 308
2010–present Citroën DS3 Racing - EP6CDTS - 202 hp

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1.6 litre EP6/EP6C naturally aspirated
The 1.6 L engine is used in the second-generation MINI and various Peugeot 207 models. It has an 85.8 mm (3.4 in) stroke for a total of 1598 cc of displacement.

The naturally aspirated variant (EP6, EP6C) has conventional fuel injection and lost-foam cast heads. Its 11:1 compression ratio creates an output of 120 PS (118 hp/88 kW) at 6000 rpm with a redline of 6500 rpm. Torque is 118 lb-ft (160 N·m) at 4250 rpm.

[DS3RACING96]

Are part numbers the same?

Not sure on part numbers mate, bigge mite ave clue on part numbers

[cameron20020]

under the service manual, "assembly piston":
EP6C: 0628T1
EP6CDT: 0628S1
EP6CDT M: 0628X7 / RP 16 078 214 80
EP6DT: 0628S1
EP6DTS: 0628T4

Compression ratios: (service manual only includes EP6DTE )
https://drive.google.com/file/d/0B6X...ew?usp=sharing

[Jamie@SPTuning]

Cheers